Note : Les descriptions sont présentées dans la langue officielle dans laquelle elles ont été soumises.
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ELECTRIC RITCHEN APPLT~NCE
COMPRISING A HEATING MI ING ACCESSORY
The present invention relates to an electric
kitchen appliance comprising an accessory permlttiny mixiny
and heating a food preparation such as a sauce.
There are known electric kitchen appliances com-
prising a base enclosing an elec~ric motor and transmissionmembers to drive in rotation a vertical shaft protruding from
the base, this base being normally adapted removably to
receive a container encloslng a chopping and slicing member
adapted to be secured directly to the said vertical shaft.
The output shaft of these appliances rotates
normally at a speed greater than l,000 rpm. The speed of
rotation is no~ suitable for the preparation of foodstuffs
such as sauces which require much slowex speeds of rotation
(of the order of lO0 to 200 rpm).
Moreover, the appliances of the above type are not
provided with heating means.
There are however known e~ec~ric ki~chen appliances
of the sauce-making type adapted to mix a~ low speeds of
rotation and to heat the foodstuffs.
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These devices comprise a base which encloses a
reduction system adapted to achieve a low speed of rotation
as well as electric heating means structurally connected to
the base of the apparatus.
5Of course, these devices do not permit permitting
performing the functions of chopping and slicing characteris-
tic of the usual electric kitchen appliances mentioned above.
The object of the present invention is to provide
an electric kitchen appliance of the usual type which can be
10converted to a hea~ing mixing apparatus and whlch thus can
achieve according to the wishes of the user the usual func-
tions of chopping and slicing as well as the function of
mixing with heating.
The invention also provides an electric kitchen
15appliance comprising a base enclosing an electric motor and
transmission members to drive in rotatior. a vertical shaft
protruding from the base, this base being normally adapted
removably to receive a receptacle enclosing a chopping and
slicing member adapted to be directly coupled with the said
20vertical shaft.
According to the invention, this appliance is
characterized in that it comprises also a heating mixing
accessory comprising a receptacle enclosing a working tool
whose lower part is in thermal contact with heating means,
25said working tool ~eing adapted to be coupled to the vertical
shaft of the base.
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Thus this heating accessory is adapted to be
positioned on the base of the appliance in the position
provided for the usual non-heating accessories of the
appliance.
5The invention accordingly permits transforming in a
simple and economical manner a conventional appliance into a
heating appliance.
According to a preferred embodiment of the inven-
tion, the heating accessory comprises a speed reduction
10system connected to the wor~ing tool and disposed below the
heating means, this reduction system being adapted to be
coupled to the vertical shaft of the base.
Thus, to transform a usual appliance into a heating
mixing apparatus, it suffices to adapt the accessory on the
15base of the usual appliance in such a way that the reduction
system of this aGCessOry will come into driving relation with
the output shaft of the base.
This reduction system permits achieving speeds of
rotation much lower than that of said output shaft.
20Preferably, the receptacle rests on heating means
which is preferably constituted by a heating sole which is an
integral part of the accessory.
Accordlng to a preferred embodiment of the inven-
tion, ths accessory comprises a casing enclosing the speed
25reduction system and comprising an internal wall comprising
means to secure the latter to the base. These securement
means are identical to those provided at the base of the
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receptacle which will be directly secured on the base in the case
o known applianceO
The said casing comprises an upper wall on which is
fixed the heating sole.
According to a preferred embodiment of the invention,
the heating sole comprises on its surface adjacent the upper wall
of the casing an electric heating resistance, this latter being
spaced from said upper wall o the casing by a layer of air, and
khe sole being connecte~ to this upper wall by means of blocks of
thermally isolating material.
In accordance with the present invention, there is
provided an electric kitchen appliance system, comprising a base
having a support surace and enclosiny an electric motor and
transmission members to drive in rotation a vertical shaft pro-
truding from the support surface; a chopping and slicing accessory
ncluding a vessel having~a bottom for engaging said chopping
and sli¢ing accessory with the support surface of the base, and
a chopping~and slicing member adapted to be coupled with the ver-
tical shaft when the chopping and slicing accessory is engaged with
the support surface o the base; and a heating mixing accessory
including a bottom for engaging said heating accessory with the
s~pport surfa¢e of the base, a receptacle enclosing a working
tool, and heatins means to receive in thermal~contact a lower
part o the receptacle, said working tool beingladapted to be
coupled with the vertical shat when the heating mixing accessory
is engage~ with the support surface of the base.
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Other characteristics and advantages of the invention
will appear from the following description~
In the accompanying drawings given by way of non-
limiting example:
Figure 1 is a longi.tudinal cross sectional view of
a known electrickitchen appliance provided with a non-heating
receptacle comprising a rotatable chopping and slicing member;
Figure 2 is a longitudinal cross-sectional view of the
appliance outfitted according to the invention with a heating and
mixing accessory~
Figure 3 is a longitudinal cros~s section of the
heating and mixing accessory alone; and
Figure 4 is a view from above of the appliance pro-
vided with the heating and mixing accessory, without the receptacle.
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In the embodiment of Figs. 1 and 2, the electric
kitchen appliance comprises a base 1 enclosing an electric
motor 2 and transmission members 3, 4, 5 to drive in rotation
a vertical shaft 6 protruding from the surface 7 of base 1.
In the example shown in Fig. ;2, the base 1 remov-
ably receives a receptacle 8 enclosing a rotatable chopping
and slicing member 9 whose central hub 10 is directly coupled
with the vertical shaft 6 projecting ~rom the surface 7 of
the base.
The bottom 11 of the receptacle 8 comprises means
(not shown) permitting securiny this receptacle 8 to the
surface 7 o~ the base. These securement means can be of the
bayonet type.
The side wall of the receptacle 8 has a finger 12
which coacts with an electric security device which does not
permit operating the motor except when the receptacle 8 is
correctly secured on the base 1.
: The output shaft 6 has a speed of rotation o~ about
1,500 to 1,200 rpm which is well adapted to the functions of
chopping and/or slicing.
In Fig. 2~, the receptacle 8 has been replaced
according to the invention by heating mixing accessory 13.
This accessory 13 comprise a metallic receptacle 14
enclosing a mixing member 15. The bottom 16 of this
receptacle 14 rests on a heating soIe 17, for example o~
aluminum. A speed reduction system 18 rotatably connected to
the mixing member 15 is disposed below the heating sole 17.
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This reduction system 18 is a part of the accessory 13 and is
removably secured to the vertical shaft ~ of the base 1.
The a~cessory 13 comprises (see also Fig. 3) a
casing 19 of plastic material enclosing the speed reduction
system 18 and comprising a lower wall 20 having means, for
example of the type of a hayonet 37, to secure the latter to
the base 1. The securement means are identical to those
provided on the base of ~he receptacle 8, in the case of Fig.
1. The casing 19 comprises an upper wall 21 to which is
secured the heating sole 17.
The heating sole 17 comprises on its surface
adjacent the upper wall 21 of the casing 19, an electric
heating resistance 22 spaced from this upper wall 21 of the
casing by a layer~of air.
The sole 17 is connected to this upper wall 21 by
means of blocks 23 of thermally insulating material, so as to
limit the thermal bridges between the heating sole 17 and the
casing 19 of plastic material.
The reduction member 18 comprises a vertical recess
24 permitting effecting a coupling by interfitting with the
output shaft 6 of the base 1.
The reduction ratio of the reduction system 18 is
comprised between 5 and 20. It thus permits reducing the
speed of rotation of the mixing member 15 to about 100 to 300
rpm.
- This reduction ratio is achieved by a series of
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pinions 25, 26, 27, 28, 29, 30 (see Fig. 4) in engagement
with each other.
The upper surface 17a of the heating sole 17
comprises means (no~ shown) to secure by rotation the recep-
tacle 14 on this sole 17. These means can be of the bayonettype.
Moreover, the receptacle 14 comprises a vertical
chimney 37 in which is engaged a vertical shaft 32 protruding
from the reduction system 18. This shaft 32 is removably
coupled to a socket 33 integral with the mixing member 15
rotatably mounted within the receptacle 14.
The casing 19 comprises also a lateral protuberance
34 serving as a gripping handle for the accessory 13. This
protuberance 34 encloses timing means 35 for the operation of
the heating resistance 22. The timing means used in this
; embodiment consists of a mechanical timer. It could per-
fectly well also be an electronic device, coupled if desired
to an electronic thermostat system for regulation of the sole
17. Obviously, electric actuation of the heating element 22
is intended. This comprises a cord extending from the wall
of the casing 21, not shown in the drawings, and provided
with a connector connectible elther to an external current
supply or to a~current source encased in the base 1 of the
appliance, and hence the supply depends on the operating
condition of the appliance.
Moreover, the casing 19 comprises a lateral finger
36 whose position corresponds to that o~ the finger 12 of the
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receptacle ~ and coacts with a safety device to permit
operation of the appliance only when the accessory 13 is
secured to the base 1.
The use of the heating and mixing accessory which
has been described is very simple.
When the user desires to heat and mix up food
preparations such as a sauce, it su~fices to li~t off the
base l the receptacle 8 provided with the chopping and
slicing member and to replace it with the mixing heating
accessory 13.
For this purpose, the recess 24 of the reduction
system 18 is engaged over the output shaft 6, then the
accessory 13 is secured to the base 1 by turning this acces-
sory by means of the handle 34.
The axial socket 33 of receptacle 1~ is then
engaged on the outpu~ shaft 32 o~ the reduction system and
then this receptacle 14 is secured to the heatins sole 17.
Of course, the invention is not limited to the
embodiment which has been described, as numerous modifica-
tions can be madP to this without departing ~rom the scope of
the invention.
Thus, the casing 19 of the accessory 13 could also
enclose a thermostat permitting regulating the heating
temperature of the sole 17.
Moreover, the h~ating sole 17 could be an integral
part of ~he base of the receptacle 14 and could comprise
means for removably securing it to the casing 19.
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On the other hand, the working tool of the acce~-
sory, instead of being a mixing arm could have cutting means.
Still further, the heating mea:ns, instead of being
constituted by a heating sole or plate on which the recep-
tacle 14 rests, could be cons~ituted by heating means enclos-
ing this receptacle.
Also, the speed reducer cs~ul cl be replaced by an
electronic sequencer capable of controlling the speed of
rotation of the electric motor located in the base o~ the
appliance.
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